Record Display for the EPA National Library Catalog
RECORD NUMBER: 26 OF 73
|OLS Field Name||OLS Field Data|
|Main Title||Effects of Ozone and Soil Water Deficit on Roots and Shoots of Field-Grown Soybeans.|
|Author||Heggestad, H. E. ; Anderson, E. L. ; Gish, T. J. ; Lee, E. H. ;|
|CORP Author||Agricultural Research Service, Beltsville, MD. Plant Stress Lab.;Corvallis Environmental Research Lab., OR.|
|Additional Subjects||Ozone ; Air pollution ; Soybean plants ; Field tests ; Soil water ; Stress(Physiology) ; Growth ; Biomass ; Weight(Mass) ; Length ; Yield ; Seeds ; Reprints ; Glycine max ; Roots|
Water-stressed and well-watered soybean (Glycine max cvs.Williams and Corsoy) plants were exposed to increasing seasonal doses of ozone (O3) using open-top field chambers and ambient air plots. Chamber O3 treatments included charcoal filtered (CF) air, non-filtered (NF) air, NF+0.03, NF+0.06 and NF+0.09 ul/liter O3. Soil water potentials measured at 25 and 45 cm averaged - 040 M Pa and -0.05 M Pa, respectively, for the plots in the water-stressed and well-watered series. Total root length/core, root length densities, and biomasses (dry weights) were determined. In both soil moisture regimes, with both cultivars, there was a linear decrease in seed yield and top dry weight as the O3 exposure dose increased.